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dnl #
dnl # Certain kernel build options are not supported. These must be
dnl # detected at configure time and cause a build failure. Otherwise
dnl # modules may be successfully built that behave incorrectly.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEFINED], [
AS_IF([test "x$cross_compiling" != xyes], [
AC_RUN_IFELSE([
AC_LANG_PROGRAM([
#include "$LINUX/include/linux/license.h"
], [
return !license_is_gpl_compatible(
"$ZFS_META_LICENSE");
])
], [
AC_DEFINE([ZFS_IS_GPL_COMPATIBLE], [1],
[Define to 1 if GPL-only symbols can be used])
], [
])
])
ZFS_AC_KERNEL_SRC_CONFIG_THREAD_SIZE
ZFS_AC_KERNEL_SRC_CONFIG_DEBUG_LOCK_ALLOC
ZFS_AC_KERNEL_SRC_CONFIG_TRIM_UNUSED_KSYMS
ZFS_AC_KERNEL_SRC_CONFIG_ZLIB_INFLATE
ZFS_AC_KERNEL_SRC_CONFIG_ZLIB_DEFLATE
AC_MSG_CHECKING([for kernel config option compatibility])
ZFS_LINUX_TEST_COMPILE_ALL([config])
AC_MSG_RESULT([done])
ZFS_AC_KERNEL_CONFIG_THREAD_SIZE
ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
ZFS_AC_KERNEL_CONFIG_TRIM_UNUSED_KSYMS
ZFS_AC_KERNEL_CONFIG_ZLIB_INFLATE
ZFS_AC_KERNEL_CONFIG_ZLIB_DEFLATE
])
dnl #
dnl # Check configured THREAD_SIZE
dnl #
dnl # The stack size will vary by architecture, but as of Linux 3.15 on x86_64
dnl # the default thread stack size was increased to 16K from 8K. Therefore,
dnl # on newer kernels and some architectures stack usage optimizations can be
dnl # conditionally applied to improve performance without negatively impacting
dnl # stability.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_CONFIG_THREAD_SIZE], [
ZFS_LINUX_TEST_SRC([config_thread_size], [
#include <linux/module.h>
],[
#if (THREAD_SIZE < 16384)
#error "THREAD_SIZE is less than 16K"
#endif
])
])
AC_DEFUN([ZFS_AC_KERNEL_CONFIG_THREAD_SIZE], [
AC_MSG_CHECKING([whether kernel was built with 16K or larger stacks])
ZFS_LINUX_TEST_RESULT([config_thread_size], [
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_LARGE_STACKS, 1, [kernel has large stacks])
],[
AC_MSG_RESULT([no])
])
])
dnl #
dnl # Check CONFIG_DEBUG_LOCK_ALLOC
dnl #
dnl # This is typically only set for debug kernels because it comes with
dnl # a performance penalty. However, when it is set it maps the non-GPL
dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
dnl # This will cause a failure at link time which we'd rather know about
dnl # at compile time.
dnl #
dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
dnl # with the upstream community we add a check to detect this case.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_CONFIG_DEBUG_LOCK_ALLOC], [
ZFS_LINUX_TEST_SRC([config_debug_lock_alloc], [
#include <linux/mutex.h>
],[
struct mutex lock;
mutex_init(&lock);
mutex_lock(&lock);
mutex_unlock(&lock);
], [], [$ZFS_META_LICENSE])
])
AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
ZFS_LINUX_TEST_RESULT([config_debug_lock_alloc], [
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_MSG_ERROR([
*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
*** with the CDDL license and will prevent the module linking stage
*** from succeeding. You must rebuild your kernel without this
*** option enabled.])
])
])
dnl #
dnl # Check CONFIG_TRIM_UNUSED_KSYMS
dnl #
dnl # Verify the kernel has CONFIG_TRIM_UNUSED_KSYMS disabled.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_CONFIG_TRIM_UNUSED_KSYMS], [
ZFS_LINUX_TEST_SRC([config_trim_unusued_ksyms], [
#if defined(CONFIG_TRIM_UNUSED_KSYMS)
#error CONFIG_TRIM_UNUSED_KSYMS not defined
#endif
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_CONFIG_TRIM_UNUSED_KSYMS], [
AC_MSG_CHECKING([whether CONFIG_TRIM_UNUSED_KSYM is disabled])
ZFS_LINUX_TEST_RESULT([config_trim_unusued_ksyms], [
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AS_IF([test "x$enable_linux_builtin" != xyes], [
AC_MSG_ERROR([
*** This kernel has unused symbols trimming enabled, please disable.
*** Rebuild the kernel with CONFIG_TRIM_UNUSED_KSYMS=n set.])
])
])
])
dnl #
dnl # Check CONFIG_ZLIB_INFLATE
dnl #
dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_CONFIG_ZLIB_INFLATE], [
ZFS_LINUX_TEST_SRC([config_zlib_inflate], [
#if !defined(CONFIG_ZLIB_INFLATE) && \
!defined(CONFIG_ZLIB_INFLATE_MODULE)
#error CONFIG_ZLIB_INFLATE not defined
#endif
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_CONFIG_ZLIB_INFLATE], [
AC_MSG_CHECKING([whether CONFIG_ZLIB_INFLATE is defined])
ZFS_LINUX_TEST_RESULT([config_zlib_inflate], [
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AC_MSG_ERROR([
*** This kernel does not include the required zlib inflate support.
*** Rebuild the kernel with CONFIG_ZLIB_INFLATE=y|m set.])
])
])
dnl #
dnl # Check CONFIG_ZLIB_DEFLATE
dnl #
dnl # Verify the kernel has CONFIG_ZLIB_DEFLATE support enabled.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_CONFIG_ZLIB_DEFLATE], [
ZFS_LINUX_TEST_SRC([config_zlib_deflate], [
#if !defined(CONFIG_ZLIB_DEFLATE) && \
!defined(CONFIG_ZLIB_DEFLATE_MODULE)
#error CONFIG_ZLIB_DEFLATE not defined
#endif
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_CONFIG_ZLIB_DEFLATE], [
AC_MSG_CHECKING([whether CONFIG_ZLIB_DEFLATE is defined])
ZFS_LINUX_TEST_RESULT([config_zlib_deflate], [
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
AC_MSG_ERROR([
*** This kernel does not include the required zlib deflate support.
*** Rebuild the kernel with CONFIG_ZLIB_DEFLATE=y|m set.])
])
])
|
